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Science. 2000 Feb 11;287(5455):1019-22.

Zener model description of ferromagnetism in zinc-blende magnetic semiconductors

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  • 1Research Institute of Electrical Communication, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan. Institute of Physics and College of Science, Polish Academy of Sciences, al. Lotnikow 32/46, PL-02668 Warsaw, Poland. Laboratoire de Spectr.

Abstract

Ferromagnetism in manganese compound semiconductors not only opens prospects for tailoring magnetic and spin-related phenomena in semiconductors with a precision specific to III-V compounds but also addresses a question about the origin of the magnetic interactions that lead to a Curie temperature (T(C)) as high as 110 K for a manganese concentration of just 5%. Zener's model of ferromagnetism, originally proposed for transition metals in 1950, can explain T(C) of Ga(1-)(x)Mn(x)As and that of its II-VI counterpart Zn(1-)(x)Mn(x)Te and is used to predict materials with T(C) exceeding room temperature, an important step toward semiconductor electronics that use both charge and spin.

PMID:
10669409
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